/Engine/Source/Editor/SceneOutliner/Public/ISceneOutlinerMode.h
Test whether the specified payload can be dropped onto this tree item
virtual [FSceneOutlinerDragValidationInfo](API\Editor\SceneOutliner\FSceneOutlinerDragValidationInfo) ValidateDrop ( const [ISceneOutlinerTreeItem](API\Editor\SceneOutliner\ISceneOutlinerTreeItem) & DropTarget, const [FSceneOutlinerDragDropPayload](API\Editor\SceneOutliner\FSceneOutlinerDragDropPayload) & Payload ) const